Temporary binder.



A. L. BUNCH.

TEMPORARY BINDER.

urmouxon FILED AUG.15,'1910.

Patented Mar. 5,'1912.

U TED STATES PATENT OFFICE.

ALBERT L. BUN CE, OF CHICAGO, ILLINOIS, ASSIGNOR T0 WORKMANMANUFACTURING COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

TEMPORARY BINDER.

Specification of Letters Patent.

Application filed August 15, 1910. Serial No. 577,355.

The improved binder member which forms the special subject matter of myinvention is constructed of sheet metal and is so made that no jointsare visible in this construction, the binder member thereby being causedto present a neat appearance, and at the same time it possesses greatstrength and is cheap to construct. This member consists of a main bodyportion and a hinge pin socket which is formed integral therewith, the"edge of the metal forming this socket engaging the opposite edge of themetal sheet and holding it securely in position. 'These hinge pinsockets occur at intervals along the binder member, the, interveningspaces being occupied by corresponding hinge pin sockets on the coversof the binders.

A further advantage of my invention con sists in the special form ofbinder member, its inner side being made at an angle so that the leavesin the binder may be readily turned back when the binder is open andfollow the curvature of the cover when this is. done. The cover ispreferably s0 constructed that it may be bent back to a much greaterextent than is usual 'in temporary binders, thus allowing better accessto the leaves which are held in the binder.

These and other advantages of my invention will be more apparent byreference to the accompanying drawings which show a preferred form ofconstruction and in which:

Figure 1 is a plan view of the temporary binder with the various partsin position. Fig. 2 is an enlarged fragmentary end elevation showing thetwo binder members, the

leaves held therebetween, and the two covers of the binder. Fig. 3 is aview similar to Fig. 2 except that the upper cover and a few of theleaves are shown as bent back over the upper binder member. Fig. 4 is aview similar to Fig. 2, the main portions of the two covers having beenremoved to show the stiffening members which are used in connectiontherewith. Fig. 5 is an enlarged transverse section through one of thebinder members. Fig. 6 is a reduced plan view of the sheet metal blankfrom which a binder member may be formed.

In the temporary binder of my invention an upper binder member 10 and alower binder member 11 are employed, the upper member having the caps 12and 12 on its ends and the lower binder member having the caps 13, in amanner similar to that described in the application of Halpin, abovementioned. The lower binder member is provided with the sectional posts14 which project upwardly through suitable apertures in the upper bindermember 10. The leaves 15 are bound in position by locking the upperbinder member 10 to the sectional posts 14 by means of rotation of thelocking shaft having the rectangular end l6,this being accomplished by asuit able key 17 Each of the binder members 10 and 11 are of the shapeshown in Fig. 5. The two sides 17 and 18 are substantially parallel andare connected by the curved portion 19. From the side 18, the portion 20extends in an oblique direction to the side 17, the edge portion 21being bent so that it is parallel with and engages the side 17. The edgeof the side 17 is folded in order to form the hinge pin socket 22, theedge of this socket Patented Mar. 5,1912.

engaging the edge portion 21, just -mentioned, and holding the samesecurely in position. By this construction it will be apparent that noseam is visible from the outside of the binder.

It will be understood that in the construction of the binder members thehinge pin sockets 22 are formed at intervals, blank spaces being leftbetween adjacent hinge sockets. Such spaces are occupied bycorresponding hinge pin sockets 23 on the stifiening members of thecovers, and a suitable hinge pin 24 engages all of the hinge pinsockets, thereby connecting the covers with the binder members.

'As' best shown in Fig. 4, each of the covers 25 and 26 is provided witha stifiening mem- I from which one of the binder members 10 or 11 may beformed. The main body portion 29 is formed into the two sides 17 and 18,the curved end portion 19, and the obliquely disposed portion 20.portions 21 are indicated as occurring at intervals on the blank,whereas the hinge pin sockets 22 are formed from the projections on theblank and disposed opposite to the projections 21.

As most clearly shown in Fig. 3, the form of my binder member allows theleaves to follow the curvature of the cover when the same is turned backand to lie flat against the cover.

It will be apparent to those skilled in the art that considerablemodification might be made in the form of binder member which made of asheet of metal folded longitudinally to provide a pair of substantiallypar- The edge allel spaced walls, one of said wall sections being bentto contact along its edge portion with the opposite wall of the member,such latter wall being bent along its edge portion to provide a hingepin socket and -to clamp between said socket and the wall said edgeportion of the first wall, substantially as described.

3. A hollow temporary binder member comprising a single folded sheet ofmetal, provided with an integral hinge pin socket, and having a singlejoint concealed beneath said socket, substantially as described.

4. A hollow temporary binder member made of a single folded sheet ofmetal, provided with an integral hinge pin socket, and having a singleunsoldered joint concealed beneath and maintained closed by said socket,substantially as described. 7

5. In a temporary binder, thecombination of a binder member having ahinge portion offset laterally from the surface of said member adaptedto contact with the leaves secured in the binder, said member having anobliquely disposed surface extending from said hinge portion to saidportion adapted to contact with the leaves, and a cover having a curvedportion hinged to the hinge portion of said member, whereby in the openposition of the binder the leaves are adapted to follow the curvature ofthe cover near the hinge and lie flat upon said cover, substantially asdescribed.

ALBERT L. BUNGE. WVitnesses:

JOSEPH D. HUGHES, THOS. P. HALPIN.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. G.

